function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2021', 27],
    ['2019', 10],
    ['2018', 6],
    ['2017', 19],
    ['2015', 6],
    ['2014', 13],
    ['2004', 7],
    ['2003', 4],
    ['1983', 7],
    ['1969', 5],
    ['1955', 14],
    ['1951', 6],
    ['1942', 4],
    ['1882', 4],
    ['1810', 7],
    ['Other (61)', 93]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=232)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerYear', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerYear'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerYear);